peracer

By surface analysis, per- +‎ ācer. Due to the existence of Umbrian perakre, the linguist Frank Heidermanns suggests that the term may reflect Proto-Italic *per-ākris, itself from *akris. De Vaan, however, relates Umbrian perakre to perakne.

• (Classical Latin) IPA^(key): [pɛˈraː.kɛr]
• (modern Italianate Ecclesiastical) IPA^(key): [peˈraː.t͡ʃer]

perācer (feminine perācris, neuter perācre, comparative perācrior, superlative perācerrimus, adverb perācriter); third-declension three-termination adjective

1. very sharp
   1. keen
      • 106 BCE – 43 BCE, Cicero, Letters to Friends:

        sed tamen ipse Caesar habet peracre iudicium

        But Caesar himself has very sharp judgement

Third-declension three-termination adjective.

• “peracer”, in Charlton T. Lewis and Charles Short (1879), A Latin Dictionary, Oxford: Clarendon Press
• peracer in Georges, Karl Ernst; Georges, Heinrich (1913–1918), Ausführliches lateinisch-deutsches Handwörterbuch, 8th edition, volume 2, Hahnsche Buchhandlung
• “peracer”, in Gaffiot, Félix (1934), Dictionnaire illustré latin-français, Hachette.
• De Vaan, Michiel (2008), Etymological Dictionary of Latin and the other Italic Languages (Leiden Indo-European Etymological Dictionary Series; 7), Leiden, Boston: Brill, →ISBN, page 43
• Frank Heidermanns (2002), “Nominal Composition in Sabellic and Proto–Italic”, in Transactions of the Philological Society‎^[1], volume 100, number 2, →DOI, →ISSN, page 192